321 Studios GHDX2-2430S-24F4D manual FC Lasers, FC Speed Auto-negotiation, SFP Transceivers

Galaxy GHDX2-2430S/R-24F4D Installation and Hardware Reference Manual

4.1.2FC Lasers

CAUTION!

Lasers can be hazardous and may cause permanent eye damage, and therefore must be treated with respect and used with caution. Never look at lasers without knowing that they are turned off.

Wavelengths: The lasers on fiber optic cables emit either short wave (SW) beams (770nm-860nm) or long wave (LW) (1270nm-1355nm) beams. Cables using either of these wavelengths can be used.

Laser types: Two (2) types of laser devices can be used in FC cables: Optical Fibre Control (OFC) and non-OFC lasers. The OFC lasers are high-powered and can be used over long distances.

Safety features: Due to their high power output, OFC lasers usually come with a safety mechanism that switches the laser off as soon as it is unplugged. Although non-OFC lasers are low power and do not come with this safety feature, they can still inflict damage.

4.1.3FC Speed Auto-negotiation

Speed auto-negotiation is currently not supported. All networking devices, e.g., HBAs, switches, must operate at the configured speed. Channel speed can be configured via the rear panel DIP switches.

NOTE:

1.Fibre Channel transmission speed is also determined by cable length and other factors. Make sure your connection and device configuration meet the requirements specified by your cabling devices vendors.

2.Currently Fibre host channels only operate at either the fixed 4Gb or 2Gb speed. For example, if set to 4Gb/s, all networking devices must support the 4Gb/s transfer rate.

4.1.4SFP Transceivers

The SFP transceivers for connecting your storage network should comply with 4Gbps or 2Gbps bi-directional data link specifications, and come with a laser transmitter (for fiber optic cables), LC type connector, and a metal enclosure to lower EMI.

4-2 Subsystem Connection and Operation